Effect of hybrid conductive additives on all-solid-state lithium batteries using Li2S-P2S5 glass-ceramics

Title
Effect of hybrid conductive additives on all-solid-state lithium batteries using Li2S-P2S5 glass-ceramics
Authors
신동욱
Keywords
All-solid-state lithium battery; Composite cathode; Binary conductive additive; Electrochemical property
Issue Date
2015-01
Publisher
ELSEVIER SCI LTD
Citation
CERAMICS INTERNATIONAL, v. 41, NO 3, Part B. Page. 5066-5071
Abstract
In order to enhance the electrochemical performance of all-solid-state composite cathodes, a hybrid of conductive additives consisting of Vapor Grown Carbon Fiber (VGCF), which had a high aspect ratio, and Super P carbon with a high surface area, were employed in all-solid-state composite cathodes. The effect of these additives on the electrochemical properties and microstructure was investigated. Microstructures that had valid electron conducting networks consisting of short-range conducting paths crossing the surfaces of individual LiCoO2 particles and long-range conducting paths linking neighboring LiCoO2 particles were obtained by blending of fibrous VGCF with nano-sized spherical Super P carbon particles. As a result, the all-solid-state composite cathodes using hybrid conductive additives showed a higher electronic conductivity and lower charge-transfer resistance compared with those using single conductive additives, which resulted in the highest discharge capacity of 68 mA h g(-1) at 1 C and 38 mA h g(-1) at 2 C when using the all-solid-state composite cathode with 2 wt% of VGCF and 1 wt% of Super P carbon. This indicated that the use of a hybrid conductive additive was a suitable and effective method to enhance the reversible capacity of the all-solid-state composite cathode at high current densities. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
URI
http://hdl.handle.net/20.500.11754/21101http://www.sciencedirect.com/science/article/pii/S027288421401997X
ISSN
0272-8842
DOI
http://dx.doi.org/10.1016/j.ceramint.2014.12.076
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE & ENGINEERING(신소재공학부) > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE